Mercedes E-Class (2017) is 597 mm (23.50 inch) longer, 255 mm (10.04 inch) wider and has 160 liters (5.65 ft3) bigger cargo space than Seat Leon (2016).
Seat Leon (2016) is 61 mm (2.40 inch) higher and 610 kg (1,345 lbs) lighter than Mercedes E-Class (2017).